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echo: os2prog
to: Mike Bilow
from: Phil Crown
date: 1996-04-06 21:56:04
subject: Timing out a REXX program

-=> Quoting Mike Bilow to All <=- 

 MB> I have a situation in which I want to run a REXX script periodically,
 MB> but with the ability to time out if something goes wrong.  For
 MB> example, I have a program (BinkleyTerm) which is started from a batch
 MB> file and which is usually running, but which exits with certain
 MB> errorlevels at scheduled times.  One of these errorlevels causes the
 MB> parent batch file to run a particular REXX script.  Because there are
 MB> certain real-time constraints, I need to be able to limit the amount
 MB> of time that the REXX script runs, killing it ungracefully if
 MB> necessary as a last ditch effort to keep the system running.

How about using a timer in the REXX script itself?

  call time('e') /* start the timer */

  call time('r') /* returns elapsed secs since time('e') */

  if result > MAXTIMEALLOWED then ...


 MB> The second approach is to devise some sort of REXX DLL which the REXX
 MB> script could use to set a time out on itself.  The problem here is

That's what time('e')/time('r') do.

There is also a freeware program called GO_15.ZIP, that can kill tasks
by typing 'go k taskname.cmd' but it won't kill the parent (ie. cmd.exe)

Phil
Fido:  1:124/8014.1 | Internet:  phil.crown{at}bluecafe.com


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